shitter vs doer

shitter and doer both are nouns.

Word	Noun	Adjective	Verb	Adverb
shitter	Yes	No	No	No
doer	Yes	No	No	No

As nouns, doer is a hypernym of shitter; that is, doer is a word with a broader meaning than shitter:

Other hypernyms of shitter include actor, worker.

shitter (noun)	doer (noun)
a person who defecates	a person who acts and gets things done